MUB Holdings — iShares National Muni Bond ETF
Data updated: 2026-10-22
MUB holds 7,053 securities. The top 10 make up 1.4% of net assets, led by Board of Regents of the University of Texas System, Series 2025B (0.18%) and San Antonio Water System, Series 2025D (0.15%). Municipal Bonds (100.0%) and Funds & ETFs (0.0%) are the largest sectors, and 99.5% of the portfolio is in United States. Debt holdings: 7,002 positions, 96.8% of assets.
Holdings cover 99.54% of net asset value (98.88% of total assets; remainder is cash and receivables). As of August 31, 2026 · N-PORT.
MUB Portfolio Holdings
7,053 holdings of iShares National Muni Bond ETF by percentage of net assets, from the fund's SEC N-PORT filing as of August 31, 2026. The 100 largest are listed below; the interactive table on this page lists all 7,053. The full list of 7,053 holdings can be downloaded as a CSV file from this page.
| Holding | Ticker | Sector | % of net assets | Value (USD) |
|---|---|---|---|---|
| Board of Regents of the University of Texas System, Series 2025B | — | Municipal Bonds | 0.18% | $83,781,404 |
| San Antonio Water System, Series 2025D | — | Municipal Bonds | 0.15% | $69,750,000 |
| New York State Thruway Authority, Series 2022A | — | Municipal Bonds | 0.15% | $67,487,406 |
| New York State Dormitory Authority, Series 2019D | — | Municipal Bonds | 0.13% | $57,377,781 |
| Northwest Independent School District, Series 2025 | — | Municipal Bonds | 0.12% | $56,584,540 |
| Houston Higher Education Finance Corp., Series 2024 | — | Municipal Bonds | 0.12% | $56,210,097 |
| State of New Jersey, Series 2020A | — | Municipal Bonds | 0.12% | $56,171,395 |
| Ohio State University (The), Series 2026A | — | Municipal Bonds | 0.12% | $55,964,325 |
| State of Washington, Series R-2022C | — | Municipal Bonds | 0.12% | $55,125,377 |
| State of California | — | Municipal Bonds | 0.12% | $54,785,250 |
| City of Seattle, Series 2023B | — | Municipal Bonds | 0.11% | $50,900,000 |
| Chicago Transit Authority Sales Tax Receipts Fund, Series 2024A | — | Municipal Bonds | 0.11% | $50,419,865 |
| East County Advanced Water Purification Joint Powers Authority | — | Municipal Bonds | 0.11% | $50,365,000 |
| City of Houston Combined Utility System, Series 2018C | — | Municipal Bonds | 0.11% | $50,000,000 |
| Triborough Bridge & Tunnel Authority, Series 2005B-2 | — | Municipal Bonds | 0.11% | $50,000,000 |
| New Jersey Educational Facilities Authority, Series A-1 | — | Municipal Bonds | 0.11% | $48,730,172 |
| State of Illinois, Series 2017D | — | Municipal Bonds | 0.11% | $48,620,897 |
| County of King, Series 2024 | — | Municipal Bonds | 0.11% | $48,535,000 |
| Washoe County School District, Series 2017C | — | Municipal Bonds | 0.11% | $47,880,333 |
| Commonwealth of Massachusetts, Series 2024B | — | Municipal Bonds | 0.10% | $47,356,539 |
| State of California | — | Municipal Bonds | 0.10% | $46,627,089 |
| Commonwealth of Massachusetts, Series 2022E | — | Municipal Bonds | 0.10% | $45,632,340 |
| New York City Municipal Water Finance Authority, Series 2024BB, Sub-Series BB-2 | — | Municipal Bonds | 0.10% | $45,212,050 |
| District of Columbia, Series 2025A | — | Municipal Bonds | 0.10% | $45,134,254 |
| City of New York, Series 2026B, Sub-Series B-1 | — | Municipal Bonds | 0.10% | $44,658,080 |
| Metropolitan Atlanta Rapid Transit Authority, Series 2026B | — | Municipal Bonds | 0.10% | $43,395,000 |
| City of Chicago, Series 2024A | — | Municipal Bonds | 0.10% | $43,183,141 |
| City of Colorado Springs Utilities System, Series 2024A | — | Municipal Bonds | 0.09% | $42,805,299 |
| San Diego Unified School District, Series 2020D-2 | — | Municipal Bonds | 0.09% | $41,943,573 |
| Triborough Bridge & Tunnel Authority, Series 2024A | — | Municipal Bonds | 0.09% | $40,718,592 |
| New York City Municipal Water Finance Authority, Series DD-1 | — | Municipal Bonds | 0.09% | $40,155,487 |
| New Jersey Transportation Trust Fund Authority, Series 2006C | — | Municipal Bonds | 0.09% | $40,168,320 |
| Ohio Water Development Authority Water Pollution Control Loan Fund, Series 2024C | — | Municipal Bonds | 0.09% | $40,090,000 |
| Triborough Bridge & Tunnel Authority, Series 2021A-1 | — | Municipal Bonds | 0.09% | $39,670,055 |
| New York State Thruway Authority, Series 2021A-1 | — | Municipal Bonds | 0.09% | $39,522,175 |
| Los Angeles Unified School District, Series 2020RYQ | — | Municipal Bonds | 0.09% | $39,543,387 |
| Pennsylvania Turnpike Commission, Series 2020 | — | Municipal Bonds | 0.09% | $39,250,000 |
| California Educational Facilities Authority, Series 2025A | — | Municipal Bonds | 0.09% | $39,157,206 |
| University of California, Series 2023BN | — | Municipal Bonds | 0.09% | $39,026,240 |
| Empire State Development Corp., Series 2020A | — | Municipal Bonds | 0.08% | $37,654,625 |
| New Jersey Educational Facilities Authority, Series 2024A-2 | — | Municipal Bonds | 0.08% | $37,467,264 |
| Metropolitan Government of Nashville & Davidson County, Series 2024B | — | Municipal Bonds | 0.08% | $37,334,196 |
| New York State Thruway Authority, Series 2025A | — | Municipal Bonds | 0.08% | $37,185,344 |
| Commonwealth of Massachusetts, Series 2023A | — | Municipal Bonds | 0.08% | $37,095,173 |
| New York State Thruway Authority, Series 2022A | — | Municipal Bonds | 0.08% | $36,817,708 |
| Massachusetts Bay Transportation Authority Sales Tax, Series 2024A | — | Municipal Bonds | 0.08% | $36,673,103 |
| Commonwealth of Massachusetts Transportation Fund, Series 2023B | — | Municipal Bonds | 0.08% | $36,469,954 |
| New York City Municipal Water Finance Authority, Series 2011FF-2 | — | Municipal Bonds | 0.08% | $36,255,000 |
| Board of Governors of Colorado State University System, Series 2025B | — | Municipal Bonds | 0.08% | $36,000,000 |
| Bay Area Toll Authority, Series 2023F-1 | — | Municipal Bonds | 0.08% | $35,927,059 |
| University of California, Series 2023BN | — | Municipal Bonds | 0.08% | $35,898,988 |
| City of New York, Series 2024D | — | Municipal Bonds | 0.08% | $35,907,002 |
| Prosper Independent School District, Series 2024A | — | Municipal Bonds | 0.08% | $35,688,025 |
| City of New Orleans, Series 2024A | — | Municipal Bonds | 0.08% | $35,606,861 |
| Texas Water Development Board, Series 2018B | — | Municipal Bonds | 0.08% | $35,469,268 |
| City of Los Angeles Department of Airports, Series 2025D | — | Municipal Bonds | 0.08% | $35,323,669 |
| State of California | — | Municipal Bonds | 0.08% | $35,213,227 |
| Salt River Project Agricultural Improvement & Power District, Series 2022A | — | Municipal Bonds | 0.08% | $35,213,422 |
| Triborough Bridge & Tunnel Authority, Series 2022D-2 | — | Municipal Bonds | 0.08% | $35,190,852 |
| Commonwealth of Pennsylvania, Series 2022-1 | — | Municipal Bonds | 0.08% | $35,060,017 |
| County of Ector | — | Municipal Bonds | 0.08% | $35,076,916 |
| Illinois State Toll Highway Authority, Series 2014C | — | Municipal Bonds | 0.08% | $35,040,551 |
| State of Texas, Series A | — | Municipal Bonds | 0.08% | $34,789,134 |
| Port of Tacoma, Series 2008B | — | Municipal Bonds | 0.08% | $34,790,000 |
| Dallas Independent School District, Series 2025B | — | Municipal Bonds | 0.08% | $34,682,416 |
| Foothill-Eastern Transportation Corridor Agency, Series 2021A | — | Municipal Bonds | 0.08% | $34,568,866 |
| New York State Dormitory Authority, Series 2024A | — | Municipal Bonds | 0.08% | $34,245,537 |
| Triborough Bridge & Tunnel Authority, Series 2022A | — | Municipal Bonds | 0.08% | $34,130,231 |
| New York City Municipal Water Finance Authority, Series 2011FF-1 | — | Municipal Bonds | 0.08% | $34,110,000 |
| County of Jefferson, Series 2024 | — | Municipal Bonds | 0.07% | $33,946,283 |
| State of California | — | Municipal Bonds | 0.07% | $32,888,086 |
| Illinois State Toll Highway Authority, Series 2024A | — | Municipal Bonds | 0.07% | $32,841,702 |
| State of Washington, Series R-2022D | — | Municipal Bonds | 0.07% | $32,702,539 |
| California Infrastructure & Economic Development Bank, Series 2023 | — | Municipal Bonds | 0.07% | $32,728,104 |
| State of Texas, Series A | — | Municipal Bonds | 0.07% | $32,604,195 |
| Commonwealth of Massachusetts, Series 2021D | — | Municipal Bonds | 0.07% | $32,447,699 |
| State of Maryland, Series 2023A | — | Municipal Bonds | 0.07% | $32,229,597 |
| State of Maryland, Series 2022A | — | Municipal Bonds | 0.07% | $32,151,984 |
| State of Illinois, Series 2023C | — | Municipal Bonds | 0.07% | $31,976,373 |
| Southern California Public Power Authority, Series 2024-1 | — | Municipal Bonds | 0.07% | $31,939,111 |
| District of Columbia Income Tax, Series 2022A | — | Municipal Bonds | 0.07% | $31,748,118 |
| New York City Transitional Finance Authority Future Tax Secured, Series 2021E-1 | — | Municipal Bonds | 0.07% | $31,615,344 |
| Commonwealth of Pennsylvania, Series 2025A | — | Municipal Bonds | 0.07% | $31,306,404 |
| North Texas Tollway Authority, Series 2008D | — | Municipal Bonds | 0.07% | $31,248,999 |
| Missouri Highway & Transportation Commission, Series 2026A | — | Municipal Bonds | 0.07% | $31,097,593 |
| Empire State Development Corp., Series 2023B | — | Municipal Bonds | 0.07% | $31,080,189 |
| Monroe County Industrial Development Corp., Series 2020A | — | Municipal Bonds | 0.07% | $31,044,805 |
| North Texas Tollway Authority, Series 2008D | — | Municipal Bonds | 0.07% | $30,835,531 |
| University of California, Series 2020BE | — | Municipal Bonds | 0.07% | $30,623,926 |
| New York City Transitional Finance Authority Future Tax Secured, Series 2024F-1 | — | Municipal Bonds | 0.07% | $30,555,203 |
| Connecticut State Health & Educational Facilities Authority, Series 2025B-2 | — | Municipal Bonds | 0.07% | $30,160,994 |
| County of Miami-Dade, Series A | — | Municipal Bonds | 0.07% | $30,106,852 |
| New Jersey Economic Development Authority, Series 2023RRR | — | Municipal Bonds | 0.07% | $30,051,115 |
| Salt River Project Agricultural Improvement & Power District, Series 2023A | — | Municipal Bonds | 0.07% | $29,936,047 |
| Texas Water Development Board, Series 2022 | — | Municipal Bonds | 0.07% | $29,689,146 |
| New York Power Authority, Series 2020A | — | Municipal Bonds | 0.07% | $29,588,471 |
| Port Authority of New York & New Jersey, Series 244 | — | Municipal Bonds | 0.06% | $29,435,014 |
| City of Houston Combined Utility System, Series 2024A | — | Municipal Bonds | 0.06% | $29,459,531 |
| Commonwealth of Pennsylvania, Series 2023-1 | — | Municipal Bonds | 0.06% | $29,137,029 |
| Metropolitan Transportation Authority, Series 2020C-1 | — | Municipal Bonds | 0.06% | $28,944,850 |
MUB Sector Allocation
iShares National Muni Bond ETF holdings grouped by sector, by share of the portfolio's market value.
| Sector | Weight | Holdings |
|---|---|---|
| Municipal Bonds | 100.0% | 7051 |
| Funds & ETFs | 0.0% | 1 |
| Unknown | 0.0% | 1 |
MUB Country Allocation
Where iShares National Muni Bond ETF's holdings are domiciled, by percentage of net assets (largest 1).
| Country | % of net assets |
|---|---|
| United States | 99.5% |
MUB Portfolio Allocation
Asset-class allocation of iShares National Muni Bond ETF by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 97.4% |
| Cash & Equivalents | 2.1% |
MUB Debt Constituents
Largest debt holdings of iShares National Muni Bond ETF by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Board of Regents of the University of Texas System | 0.18% |
| New York State Thruway Authority | 0.15% |
| New York State Dormitory Authority | 0.13% |
| Northwest Independent School District | 0.12% |
| Houston Higher Education Finance Corp. | 0.12% |
| State of New Jersey | 0.12% |
| Ohio State University (The) | 0.12% |
| State of Washington | 0.12% |
| State of California | 0.12% |
| Chicago Transit Authority Sales Tax Receipts Fund | 0.11% |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.